The Windows GUI tries to use the latest version of Internet Explorer installed (usually 11), by setting the
FEATURE_BROWSER_EMULATION registry key.
You can test this by opening this link in the Preview component:
https://www.whatsmybrowser.org/
Does that mean the GUI somehow sets that registry key? Does it do so right before opening the browser? I'm just being curious here, although it's also good to know what we can expect from client machines.
Here's the result btw, so you're completely right:

The registry key is indeed set by the GUI just before showing the Preview component.